> In "single" data mode, btrfs makes no special attempt to keep files > together on the same disk, but if a file is written linearly and never > modified there's a chance it might happen. (Each modification will COW > the file, putting the modified portion on a random disk.) > > As a result, yes, you may lose a substantial number - even most - of > your files if one disk dies while in single data mode. So, on highly fragmented fs reliability in single data mode is near to raid0? Rhetorical question, actually. > The failure mode you are describing would be interesting, and people > talk about it now and then, but there is no current support in btrfs for > it. Is there any plans to support it? > (One thing to note: small files are often stored in the metadata area > instead of data area, which would be raid1 in your setup. As a result, > those small files are more likely to be recoverable). -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
